/*
 * JSFConsole - Lightweight JSF Application Monitor
 * Copyright (C) 2009  Grzegorz Bugaj
 * http://www.gregbugaj.com
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * 
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
*/
package com.gregbugaj.reflector.visitors;

import java.lang.reflect.Array;
import java.util.Iterator;
import java.util.NoSuchElementException;

/**
 * Because we can't do this
 * byte[] b=byte[] can't be casted to Object[] a=(Object[])b;
 * we are wrapping arrays and then use reflection to retrieve their elements
 * @param <E>
 *
 */
public class ArrayWrapper implements Iterator<Object>{
	private int pos = 0;
	private int length = 0;
	private Object arrayObject = null;
	
	public Object getArrayObject() {
		return arrayObject;
	}

	public ArrayWrapper(final Object obj) {
		if (obj == null) {
			throw new IllegalArgumentException("obj must be not null");
		}
		if (obj.getClass().isArray() == false) {
			throw new IllegalArgumentException("obj must be an Array");
		}
		arrayObject = obj;
		length = Array.getLength(arrayObject);
		reset();
	}
	
	public final void reset() { pos = 0; }
	public int getLength() { return length; }
	public int getPos() { return pos; }
	
	
	
	public boolean hasNext() {
		return (pos < length);
	}
	
	
	
	public Object next() {
		if (pos >= length) {
			throw new NoSuchElementException("No more elements");
		}
		final Object ret = Array.get(arrayObject, pos);
		pos++;
		return ret;
	}
	

	public void remove() {
		//DO Nothing
	}

}
